I'm sure the idea has been around for a while. As people started asking for one or talking about a larger centre to go with the M60/80s, maybe Ian figured the timing was right to bring it to fruition.

I think you're right. The first time I brought it up I was told there were no plans for a new/bigger centre speaker. Eventually enough people must've expressed interest, though, because I asked again later and was dangled the proverbial carrot

Can one assume that this new centre channel will require two Full Metal Brackets for wall mounting?

I am intrigued and likely would have bought it years back, but with a good soundstage using the VP150 at present, i think i'll pass, for now.

I doubt it has the screw/mount holes on the back. I don't think they had that in mind, especially since the ports are at the back. All that aside, yes, I would definitely use at least two FMB's to try and mount that sucker (but I still don't recommend it).